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Siemens 5SL4403-7 — 4-Pole MCB (DIN Rail)

Siemens 5SL4403-7 SENTRON MCB, 4P C-curve 3 A 10 kA 400 V

MPN5SL4403-7

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Siemens SENTRON 5SL4403-7, 4-pole miniature circuit breaker, C-curve, 3 A rated at 400 V AC, 10 kA breaking capacity per EN 60898 and IEC 60947-2.

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Siemens 5SL4403-7 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4403-7 — Identification
Parameter	Value
Brand name	SENTRON
Application suitability	Residential buildings/infrastructure

5SL4403-7 — Ratings
Parameter	Value
Number of poles	4
Pole configuration	4P
Rated current (In), AC	3 A
Rated voltage, AC (multi-phase)	440 V
Rated voltage, DC (max.)	72 V
Voltage type	AC

5SL4403-7 — Protection
Parameter	Value
Tripping characteristic (trip curve)	C
Rated breaking capacity (Icn), per EN 60898	10 kA
Rated breaking capacity, per IEC 60947-2	10 kA
Energy limitation class	3
Overvoltage category	III
Pollution degree	2
Degree of protection (IP)	IP20, with connected conductors
Neutral conductor switching	No
Touch protection	Yes

5SL4403-7 — Mechanical
Parameter	Value
Width in modular units	4
Width	72 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Mounting position	any
Tightening torque, max.	75 °C
Tightening torque, min.	-40 °C
Sealable	Yes

5SL4403-7 — Environmental
Parameter	Value
Halogen-free	Yes
Silicone-free	Yes
Influence of ambient temperature (derating)	+55 °C, max. 95% humidity

Product details

What this 4-pole MCB does on the rail

The Siemens 5SL4403-7 is a 4-pole (4P) miniature circuit breaker from the SENTRON family, rated 3 A at 400 V AC with a C-curve tripping characteristic.

Mounting and integration — DIN-rail fit

Mounting position is any orientation, so vertical or horizontal rail layouts work.

Rated 3 A at 30 °C ambient, but the current must be derated as panel temperature rises: 2.88 A at 40 °C, 2.82 A at 45 °C, and 2.69 A at 55 °C. The breaker itself is rated for ambient up to 75 °C (storage -40 °C), with 95% humidity max at 55 °C.